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  <title>Construct a LimitIterator</title>
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    <li>Construct a LimitIterator</li>
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  <div id="layout-content"><div id="limititerator.construct" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">LimitIterator::__construct</h1>
  <p class="verinfo">(PHP 5 &gt;= 5.1.0, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">LimitIterator::__construct</span> &mdash; <span class="dc-title">Construct a LimitIterator</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-limititerator.construct-description">
  <h3 class="title">说明</h3>
  <div class="constructorsynopsis dc-description">
   <span class="modifier">public</span> <span class="methodname"><strong>LimitIterator::__construct</strong></span>(<span class="methodparam"><span class="type"><a href="class.iterator.html" class="type Iterator">Iterator</a></span> <code class="parameter">$iterator</code></span>, <span class="methodparam"><span class="type">int</span> <code class="parameter">$offset</code><span class="initializer"> = 0</span></span>, <span class="methodparam"><span class="type">int</span> <code class="parameter">$limit</code><span class="initializer"> = -1</span></span>)</div>

  <p class="para rdfs-comment">
   Constructs a new <span class="classname"><a href="class.limititerator.html" class="classname">LimitIterator</a></span> from an 
   <code class="parameter">iterator</code> with a given starting 
   <code class="parameter">offset</code> and maximum <code class="parameter">limit</code>.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-limititerator.construct-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt>
<code class="parameter">iterator</code></dt>

     <dd>

      <p class="para">
       The <span class="classname"><a href="class.iterator.html" class="classname">Iterator</a></span> to limit.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">offset</code></dt>

     <dd>

      <p class="para">
       Optional offset of the limit.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">limit</code></dt>

     <dd>

      <p class="para">
       Optional count of the limit.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 errors" id="refsect1-limititerator.construct-errors">
  <h3 class="title">错误／异常</h3>
  <p class="para">
   Throws a <span class="classname"><a href="class.valueerror.html" class="classname">ValueError</a></span>
   if the <code class="parameter">offset</code> is less than <code class="literal">0</code>
   or the <code class="parameter">limit</code> is less than <code class="literal">-1</code>.
  </p>
 </div>


 <div class="refsect1 changelog" id="refsect1-limititerator.construct-changelog">
  <h3 class="title">更新日志</h3>
  <p class="para">
   <table class="doctable informaltable">
    
     <thead>
      <tr>
       <th>版本</th>
       <th>说明</th>
      </tr>

     </thead>

     <tbody class="tbody">
      <tr>
       <td>8.0.0</td>
       <td>
        Now throws a <span class="classname"><a href="class.valueerror.html" class="classname">ValueError</a></span> if
        <code class="parameter">offset</code> is less than <code class="literal">0</code>;
        previously it threw a <span class="classname"><a href="class.runtimeexception.html" class="classname">RuntimeException</a></span>.
       </td>
      </tr>

      <tr>
       <td>8.0.0</td>
       <td>
        Now throws a <span class="classname"><a href="class.valueerror.html" class="classname">ValueError</a></span> if
        <code class="parameter">limit</code> is less than <code class="literal">-1</code>;
        previously it threw a <span class="classname"><a href="class.runtimeexception.html" class="classname">RuntimeException</a></span>.
       </td>
      </tr>

     </tbody>
    
   </table>

  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-limititerator.construct-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-3630">
    <p><strong>示例 #1 <span class="function"><strong>LimitIterator::__construct()</strong></span> example</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$ait&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">ArrayIterator</span><span style="color: #007700">(array(</span><span style="color: #DD0000">'a'</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">'b'</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">'c'</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">'d'</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">'e'</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">$lit&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">LimitIterator</span><span style="color: #007700">(</span><span style="color: #0000BB">$ait</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">1</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">3</span><span style="color: #007700">);<br />foreach&nbsp;(</span><span style="color: #0000BB">$lit&nbsp;</span><span style="color: #007700">as&nbsp;</span><span style="color: #0000BB">$value</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #0000BB">$value&nbsp;</span><span style="color: #007700">.&nbsp;</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />}<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程会输出：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
b
c
d
</pre></div>
    </div>
   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-limititerator.construct-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><a href="class.limititerator.html#limititerator.examples" class="link">LimitIterator examples</a></li>
   </ul>
  </p>
 </div>


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